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    Split contact sensor for a heat-assisted magnetic recording slider
    61.
    发明授权
    Split contact sensor for a heat-assisted magnetic recording slider 有权

    公开(公告)号：US10657991B2

    公开(公告)日：2020-05-19

    申请号：US16524512

    申请日：2019-07-29

    Applicant: Seagate Technology LLC

    Inventor： Erik Jon Hutchinson ,  Declan Macken ,  Manuel Charles Anaya-Dufresne

    IPC: G11B11/105 ,  G11B5/31 ,  G11B5/48 ,  G11B5/60 ,  G11B5/00

    Abstract: An apparatus comprises a slider having an air bearing surface (ABS), a leading edge, and a trailing edge opposing the leading edge. A writer having a write pole is situated at or near the ABS. A near-field transducer (NFT) is situated at or near the ABS and between the write pole and the leading edge of the slider. An optical waveguide is configured to couple light from a laser source to the NFT. A contact sensor is situated between the write pole and the trailing edge. The contact sensor comprises a first ABS section situated at or near the ABS, a secondABS section situated at or near the ABS and spaced apart from the first ABS in a cross-track direction by a gap, and a distal section extending away from the ABS and connecting the first ABS section with the second ABS section.

    SPLIT CONTACT SENSOR FOR A HEAT-ASSISTED MAGNETIC RECORDING SLIDER
    62.
    发明申请
    SPLIT CONTACT SENSOR FOR A HEAT-ASSISTED MAGNETIC RECORDING SLIDER 审中-公开

    公开(公告)号：US20200090686A1

    公开(公告)日：2020-03-19

    申请号：US16524512

    申请日：2019-07-29

    Applicant: Seagate Technology LLC

    Inventor： Erik Jon Hutchinson ,  Declan Macken ,  Manuel Charles Anaya-Dufresne

    IPC: G11B5/31 ,  G11B5/48 ,  G11B5/60

    Abstract: An apparatus comprises a slider having an air bearing surface (ABS), a leading edge, and a trailing edge opposing the leading edge. A writer having a write pole is situated at or near the ABS. A near-field transducer (NFT) is situated at or near the ABS and between the write pole and the leading edge of the slider. An optical waveguide is configured to couple light from a laser source to the NFT. A contact sensor is situated between the write pole and the trailing edge. The contact sensor comprises a first ABS section situated at or near the ABS, a secondABS section situated at or near the ABS and spaced apart from the first ABS in a cross-track direction by a gap, and a distal section extending away from the ABS and connecting the first ABS section with the second ABS section.

    Bolometer and contact sensor arrangement for a heat-assisted magnetic recording device
    64.
    发明授权
    Bolometer and contact sensor arrangement for a heat-assisted magnetic recording device 有权

    公开(公告)号：US09972350B1

    公开(公告)日：2018-05-15

    申请号：US15678409

    申请日：2017-08-16

    Applicant: Seagate Technology LLC

    Inventor： Declan Macken ,  Jon Karsten Klarqvist

    IPC: G11B5/09 ,  G11B5/60 ,  G11B5/48 ,  G11B5/00

    CPC classification number: G11B5/6005 ,  G11B5/314 ,  G11B5/4866 ,  G11B5/6088 ,  G11B2005/0021

    Abstract: A slider of a heat-assisted magnetic recording head comprises an air bearing surface and an optical waveguide configured to receive light from a laser source. The slider comprises a plurality of electrical bond pads including a first bond pad and a second bond pad. A first resistive sensor is configured to sense for spacing changes and contact between the slider and a magnetic recording medium at or near a first close point of the slider. A second resistive sensor is configured to sense for spacing changes and contact between the slider and the medium at or near a second close point of the slider. A bolometer is situated at a location within the slider that receives at least some of the light communicated along the optical waveguide. The first resistive sensor, the second resistive sensor, and the bolometer are coupled together and between the first and second bond pads.

    HEAD-MEDIUM CONTACT DETECTION USING AN OSCILLATING ELECTROMAGNETIC FORCE
    67.
    发明申请
    HEAD-MEDIUM CONTACT DETECTION USING AN OSCILLATING ELECTROMAGNETIC FORCE 审中-公开

    公开(公告)号：US20170092313A1

    公开(公告)日：2017-03-30

    申请号：US15237878

    申请日：2016-08-16

    Applicant: Seagate Technology LLC

    Inventor： Daniel W. Olson ,  Declan Macken ,  Andrea L. Geer

    IPC: G11B5/60

    CPC classification number: G11B5/6011 ,  G11B5/6035 ,  G11B5/607 ,  G11B5/6076

    Abstract: An apparatus comprises circuitry configured to apply an AC signal having a frequency to one of a slider of a recording head and a magnetic recording medium. The applied AC signal causes an oscillation in an electrostatic force and clearance between the slider and the medium at the frequency of the AC signal. A thermal sensor is configured to generate a sensor signal at the AC signal frequency in response to sensing changes in temperature resulting from the oscillating clearance. A detector is coupled to the circuitry and the thermal sensor. The detector is configured to detect one or both of head-medium spacing changes and head-medium contact using a phase of a first harmonic or an amplitude of a second harmonic of the thermal sensor signal.

    Recording head with surface charge control
    69.
    发明授权
    Recording head with surface charge control 有权
    记录头带表面充电控制

    公开(公告)号：US09502064B1

    公开(公告)日：2016-11-22

    申请号：US14839590

    申请日：2015-08-28

    Applicant: Seagate Technology LLC

    Inventor： Declan Macken ,  Daniel W. Olson

    IPC: G11B21/02 ,  G11B27/36 ,  G11B5/60

    CPC classification number: G11B5/6035

    Abstract: A data recording head may consist of at least a charge control circuit that has a substrate, ground, surface charge circuitry, and data reader circuitry. The substrate may be electrically isolated from the ground and electrically connected between the surface charge circuitry and a non-zero fixed voltage. The surface charge circuitry can be configured to apply a varying substrate charge to the substrate at a predetermined frequency to alter a head media spacing between the substrate and a data storage medium.

    Abstract translation: 数据记录头可以由至少具有基板，接地，表面电荷电路和数据读取器电路的充电控制电路组成。 衬底可以与地面电隔离并电连接在表面电荷电路和非零固定电压之间。 表面电荷电路可以被配置为以预定的频率向衬底施加变化的衬底电荷，以改变衬底和数据存储介质之间的头部介质间隔。

    Electrically removable heater for a thermally actuatable thermal asperity sensor
    70.
    发明授权
    Electrically removable heater for a thermally actuatable thermal asperity sensor 有权
    用于可热致动的热凹凸传感器的电可拆卸加热器

    公开(公告)号：US09472224B2

    公开(公告)日：2016-10-18

    申请号：US14097412

    申请日：2013-12-05

    Applicant: Seagate Technology LLC

    Inventor： Declan Macken ,  Erik Hutchinson ,  Brian William Karr

    IPC: G11B21/02 ,  G11B5/60 ,  G01N25/72 ,  G01K13/00

    CPC classification number: G11B5/607 ,  G01K13/00 ,  G01N25/72 ,  G11B5/6076

    Abstract: An apparatus comprising a writer, a reader, and a sensor configured to at least sense thermal asperities of a magnetic storage medium. The apparatus includes a writer heater configured to thermally actuate the writer, a reader heater configured to thermally actuate the reader, and a sensor heater configured to thermally actuate the sensor. The thermally actuated sensor is configured to detect thermal asperities arising from the magnetic storage medium during a topographical survey of the medium. The sensor heater is configured to be rendered inoperable subsequent to the survey in response to receiving a predetermined signal while the writer and the reader heaters remain operable.

    Abstract translation: 一种包括写入器，读取器和传感器的设备，其被配置为至少感测磁存储介质的热凹凸。 该装置包括配置为热启动写入器的写入器加热器，被配置为热致动读取器的读取器加热器和被配置为热致动传感器的传感器加热器。 热致动传感器被配置为在介质的地形测量期间检测由磁存储介质产生的热凹凸。 传感器加热器被配置为在写入器和读取器加热器保持可操作时响应于接收到预定信号而在调查之后变得不可操作。

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